package com.lsl.interceptor;

import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

@Component
public class MyInterptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession();
        Object user= session.getAttribute("useraccount");
        if (user==null){
            //
            response.setCharacterEncoding("UTF-8");
            response.setContentType("text/html;charset=utf-8");
            response.getWriter().write("请先登录");
            response.sendRedirect("/");
//            request.getRequestDispatcher("/").forward(request,response);
            return true;
        }
        response.sendRedirect("/");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }

}
